Module jdk.dynalink

# Package jdk.dynalink.linker

package jdk.dynalink.linker

Contains interfaces and classes needed by language runtimes to implement their own language-specific object models and type conversions. The main entry point is the `GuardingDynamicLinker` interface. It needs to be implemented in order to provide linking for the runtime's own object model. A language runtime can have more than one guarding dynamic linker implementation. When a runtime is configuring Dynalink for itself, it will normally set these guarding linkers as the prioritized linkers in its `DynamicLinkerFactory` (and maybe some of them as fallback linkers, for e.g. handling "method not found" and similar errors in a language-specific manner if no other linker managed to handle the operation.)

A language runtime that wishes to make at least some of its linkers available to other language runtimes for interoperability will need to use a `GuardingDynamicLinkerExporter`.

Most language runtimes will be able to implement their own linking logic by implementing `TypeBasedGuardingDynamicLinker` instead of `GuardingDynamicLinker`; it allows for faster type-based linking dispatch.

Language runtimes that allow type conversions other than those provided by Java will need to have their guarding dynamic linker (or linkers) also implement the `GuardingTypeConverterFactory` interface to provide the logic for these conversions.

Since:
  9

Related Packages
Package
Description
jdk.dynalink
Contains interfaces and classes that are used to link an `invokedynamic` call site.
jdk.dynalink.linker.support
Contains classes that make it more convenient for language runtimes to implement their own language-specific object models and type conversions by providing basic implementations of some classes as well as various utilities.
jdk.dynalink.beans
Contains the linker for ordinary Java objects.
jdk.dynalink.support
Contains classes that make using Dynalink more convenient by providing basic implementations of some classes as well as various utilities.
Class
Description
ConversionComparator
Optional interface to be implemented by `GuardingTypeConverterFactory` implementers.
ConversionComparator.Comparison
Enumeration of possible outcomes of comparing one conversion to another.
GuardedInvocation
Represents a conditionally valid method handle.
GuardedInvocationTransformer
Interface for objects that are used to transform one guarded invocation into another one.
GuardingDynamicLinker
The base interface for language-specific dynamic linkers.
GuardingDynamicLinkerExporter
A class acting as a supplier of guarding dynamic linkers that can be automatically loaded by other language runtimes.
GuardingTypeConverterFactory
Optional interface that can be implemented by `GuardingDynamicLinker` implementations to provide language-specific type conversion capabilities.
LinkerServices
Interface for services provided to `GuardingDynamicLinker` instances by the `DynamicLinker` that owns them.
LinkRequest
Represents a request to link a particular invocation at a particular call site.
MethodHandleTransformer
A generic interface describing operations that transform method handles.
MethodTypeConversionStrategy
Interface for objects representing a strategy for converting a method handle to a new type.
TypeBasedGuardingDynamicLinker
A guarding dynamic linker that can determine whether it can link the call site solely based on the type of the first argument at linking invocation time.